/* ===== VARIABLES Y RESET ===== */
        :root {
            --nnexa-yellow: #F5A800;
            --nnexa-teal: #4ABFBF;
            --nnexa-black: #000000;
            --nnexa-white: #FFFFFF;
            --presencial-primary: #E67E22;
            --presencial-dark: #1A2332;
            --presencial-light: #FFF5ED;
            --presencial-accent: #D35400;
            --hibrido-primary: #3498DB;
            --hibrido-dark: #5B2C6F;
            --hibrido-light: #EBF5FB;
            --hibrido-accent: #2874A6;
            --grey-900: #1A1A1A;
            --grey-800: #2D2D2D;
            --grey-700: #4A4A4A;
            --grey-500: #767676;
            --grey-300: #D1D1D1;
            --grey-100: #F5F5F5;
            --font-primary: 'Montserrat', sans-serif;
            --font-secondary: 'Inter', sans-serif;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 3rem;
            --spacing-xl: 4rem;
            --spacing-2xl: 6rem;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.5s ease;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body { font-family: var(--font-secondary); color: var(--grey-900); line-height: 1.6; background: var(--nnexa-white); overflow-x: hidden; }
        h1,h2,h3,h4,h5,h6 { font-family: var(--font-primary); font-weight: 700; line-height: 1.2; margin-bottom: var(--spacing-sm); }
        h1 { font-size: clamp(2.5rem,5vw,4rem); font-weight: 900; }
        h2 { font-size: clamp(2rem,4vw,3rem); }
        h3 { font-size: clamp(1.5rem,3vw,2rem); }
        h4 { font-size: clamp(1.25rem,2.5vw,1.5rem); }
        p { margin-bottom: var(--spacing-sm); font-size: clamp(1rem,1.5vw,1.125rem); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); }
        .container-wide { max-width: 1400px; margin: 0 auto; padding: 0 var(--spacing-md); }
        section { padding: var(--spacing-2xl) 0; }
        .header { position: fixed; top: 0; left: 0; width: 100%; background: var(--nnexa-white); box-shadow: var(--shadow-sm); z-index: 1000; transition: var(--transition-normal); }
        .header.scrolled { box-shadow: var(--shadow-md); }
        .nav { display: flex; justify-content: space-between; align-items: center; padding: var(--spacing-sm) var(--spacing-md); }
        .nav-logo img { height: 50px; width: auto; }
        .nav-menu { display: flex; list-style: none; gap: var(--spacing-md); align-items: center; }
        .nav-link { text-decoration: none; color: var(--grey-900); font-weight: 500; font-family: var(--font-primary); transition: var(--transition-fast); position: relative; }
        .nav-link:hover { color: var(--nnexa-yellow); }
        .nav-link.active::after { content: ''; position: absolute; bottom: -5px; left: 0; width: 100%; height: 3px; background: var(--nnexa-yellow); }
        .nav-cta { background: var(--nnexa-yellow); color: var(--nnexa-black); padding: 0.75rem 1.5rem; border-radius: var(--radius-lg); font-weight: 700; transition: var(--transition-fast); }
        .nav-cta:hover { background: var(--nnexa-teal); color: var(--nnexa-white); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .nav-toggle { display: none; font-size: 1.5rem; cursor: pointer; color: var(--grey-900); }
        .hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; padding-top: 80px; overflow: hidden; }
        .hero-background { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(135deg, rgba(245,168,0,0.1) 0%, rgba(74,191,191,0.1) 50%, rgba(245,168,0,0.05) 100%); z-index: -1; }
        .hero-background::before { content: ''; position: absolute; top: -50%; right: -10%; width: 600px; height: 600px; background: var(--nnexa-yellow); opacity: 0.15; border-radius: 50%; filter: blur(100px); }
        .hero-background::after { content: ''; position: absolute; bottom: -30%; left: -5%; width: 500px; height: 500px; background: var(--nnexa-teal); opacity: 0.15; border-radius: 50%; filter: blur(100px); }
        .hero-content { max-width: 900px; z-index: 1; }
        .hero-subtitle { display: block; font-size: clamp(1rem,2vw,1.25rem); color: var(--nnexa-teal); font-weight: 600; margin-bottom: var(--spacing-sm); text-transform: uppercase; letter-spacing: 2px; }
        .hero-title { margin-bottom: var(--spacing-md); background: linear-gradient(135deg, var(--grey-900), var(--nnexa-teal)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero-description { font-size: clamp(1.125rem,2vw,1.5rem); color: var(--grey-700); margin-bottom: var(--spacing-lg); line-height: 1.8; }
        .hero-ctas { display: flex; gap: var(--spacing-md); justify-content: center; flex-wrap: wrap; }
        .btn { display: inline-block; padding: 1rem 2rem; border-radius: var(--radius-lg); font-family: var(--font-primary); font-weight: 700; font-size: 1.125rem; text-decoration: none; transition: var(--transition-fast); cursor: pointer; border: none; text-align: center; }
        .btn-primary-presencial { background: var(--presencial-primary); color: var(--nnexa-white); box-shadow: var(--shadow-md); }
        .btn-primary-presencial:hover { background: var(--presencial-accent); transform: translateY(-3px); box-shadow: var(--shadow-lg); }
        .btn-primary-hibrido { background: var(--hibrido-primary); color: var(--nnexa-white); box-shadow: var(--shadow-md); }
        .btn-primary-hibrido:hover { background: var(--hibrido-accent); transform: translateY(-3px); box-shadow: var(--shadow-lg); }
        .btn-secondary { background: transparent; color: var(--grey-900); border: 2px solid var(--grey-900); }
        .btn-secondary:hover { background: var(--grey-900); color: var(--nnexa-white); transform: translateY(-3px); }
        .hero-stats { display: grid; grid-template-columns: repeat(auto-fit,minmax(200px,1fr)); gap: var(--spacing-md); margin-top: var(--spacing-xl); }
        .stat-item { padding: var(--spacing-md); text-align: center; }
        .stat-number { font-size: clamp(2.5rem,4vw,3.5rem); font-weight: 900; color: var(--nnexa-yellow); font-family: var(--font-primary); display: block; }
        .stat-label { font-size: 1rem; color: var(--grey-700); font-weight: 500; }
        .trust-bar { background: var(--grey-900); color: var(--nnexa-white); padding: var(--spacing-md) 0; }
        .trust-content { display: flex; justify-content: center; align-items: center; gap: var(--spacing-xl); flex-wrap: wrap; }
        .trust-item { display: flex; align-items: center; gap: var(--spacing-sm); }
        .trust-item i { font-size: 1.5rem; color: var(--nnexa-yellow); }
        .trust-text { font-weight: 600; font-size: 1rem; }
        .intro { background: var(--nnexa-white); }
        .intro-header { text-align: center; max-width: 800px; margin: 0 auto var(--spacing-xl); }
        .section-subtitle { color: var(--nnexa-teal); font-weight: 600; font-size: 1rem; text-transform: uppercase; letter-spacing: 2px; margin-bottom: var(--spacing-xs); }
        .intro-cards { display: grid; grid-template-columns: repeat(auto-fit,minmax(300px,1fr)); gap: var(--spacing-lg); }
        .intro-card { padding: var(--spacing-lg); background: var(--grey-100); border-radius: var(--radius-lg); transition: var(--transition-normal); }
        .intro-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
        .intro-card-icon { font-size: 3rem; margin-bottom: var(--spacing-md); }
        .intro-card:nth-child(1) .intro-card-icon { color: var(--nnexa-yellow); }
        .intro-card:nth-child(2) .intro-card-icon { color: var(--nnexa-teal); }
        .intro-card:nth-child(3) .intro-card-icon { color: var(--presencial-primary); }
        .programas { background: var(--grey-100); }
        .programas-header { text-align: center; max-width: 800px; margin: 0 auto var(--spacing-xl); }
        .programas-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(450px,1fr)); gap: var(--spacing-lg); }
        .programa-card { background: var(--nnexa-white); border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-md); transition: var(--transition-normal); display: flex; flex-direction: column; }
        .programa-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-lg); }
        .programa-header { padding: var(--spacing-lg); color: var(--nnexa-white); position: relative; }
        .programa-card.presencial .programa-header { background: linear-gradient(135deg, var(--presencial-primary), var(--presencial-accent)); }
        .programa-card.hibrido .programa-header { background: linear-gradient(135deg, var(--hibrido-primary), var(--hibrido-accent)); }
        .programa-tag { display: inline-block; background: rgba(255,255,255,0.2); padding: 0.5rem 1rem; border-radius: var(--radius-sm); font-size: 0.875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; margin-bottom: var(--spacing-sm); }
        .programa-title { font-size: 2rem; margin-bottom: var(--spacing-sm); color: var(--nnexa-white); }
        .programa-price { font-size: 3rem; font-weight: 900; font-family: var(--font-primary); }
        .programa-price-label { font-size: 1rem; opacity: 0.9; }
        .programa-body { padding: var(--spacing-lg); flex-grow: 1; }
        .programa-info { list-style: none; margin-bottom: var(--spacing-lg); }
        .programa-info li { display: flex; align-items: flex-start; gap: var(--spacing-sm); margin-bottom: var(--spacing-sm); padding-bottom: var(--spacing-sm); border-bottom: 1px solid var(--grey-300); }
        .programa-info li:last-child { border-bottom: none; }
        .programa-info i { margin-top: 4px; font-size: 1.25rem; }
        .programa-card.presencial .programa-info i { color: var(--presencial-primary); }
        .programa-card.hibrido .programa-info i { color: var(--hibrido-primary); }
        .programa-info strong { display: block; font-weight: 600; color: var(--grey-900); }
        .programa-footer { padding: 0 var(--spacing-lg) var(--spacing-lg); }
        .curriculum-presencial { background: var(--presencial-light); }
        .curriculum-hibrido { background: var(--hibrido-light); }
        .curriculum-header { text-align: center; max-width: 800px; margin: 0 auto var(--spacing-xl); }
        .curriculum-presencial .curriculum-header h2 { color: var(--presencial-primary); }
        .curriculum-hibrido .curriculum-header h2 { color: var(--hibrido-primary); }
        .timeline { position: relative; max-width: 900px; margin: 0 auto; }
        .timeline::before { content: ''; position: absolute; left: 50%; transform: translateX(-50%); width: 4px; height: 100%; background: var(--grey-300); }
        .timeline-item { display: flex; gap: var(--spacing-lg); margin-bottom: var(--spacing-lg); position: relative; }
        .timeline-item:nth-child(odd) { flex-direction: row; }
        .timeline-item:nth-child(even) { flex-direction: row-reverse; }
        .timeline-content { flex: 1; background: var(--nnexa-white); padding: var(--spacing-md); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); position: relative; }
        .timeline-week { display: inline-block; padding: 0.5rem 1rem; border-radius: var(--radius-sm); font-weight: 700; font-size: 0.875rem; margin-bottom: var(--spacing-sm); }
        .curriculum-presencial .timeline-week { background: var(--presencial-primary); color: var(--nnexa-white); }
        .curriculum-hibrido .timeline-week { background: var(--hibrido-primary); color: var(--nnexa-white); }
        .timeline-title { font-size: 1.25rem; margin-bottom: var(--spacing-sm); }
        .timeline-description { color: var(--grey-700); line-height: 1.6; }
        .timeline-marker { position: absolute; left: 50%; transform: translateX(-50%); width: 20px; height: 20px; border-radius: 50%; border: 4px solid var(--nnexa-white); z-index: 1; }
        .curriculum-presencial .timeline-marker { background: var(--presencial-primary); }
        .curriculum-hibrido .timeline-marker { background: var(--hibrido-primary); }
        .curriculum-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(300px,1fr)); gap: var(--spacing-md); }
        .curriculum-card { background: var(--nnexa-white); padding: var(--spacing-md); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); transition: var(--transition-normal); }
        .curriculum-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
        .curriculum-card.retiro { background: linear-gradient(135deg, var(--hibrido-primary), var(--hibrido-accent)); color: var(--nnexa-white); }
        .curriculum-card.retiro h4 { color: var(--nnexa-white); }
        .metodologia { background: var(--nnexa-white); }
        .metodologia-header { text-align: center; max-width: 800px; margin: 0 auto var(--spacing-xl); }
        .fases-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(250px,1fr)); gap: var(--spacing-md); }
        .fase-card { background: var(--grey-100); padding: var(--spacing-lg); border-radius: var(--radius-lg); text-align: center; transition: var(--transition-normal); position: relative; overflow: hidden; }
        .fase-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--nnexa-yellow); transform: scaleX(0); transition: var(--transition-normal); }
        .fase-card:hover::before { transform: scaleX(1); }
        .fase-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
        .fase-number { display: inline-block; width: 60px; height: 60px; background: var(--nnexa-teal); color: var(--nnexa-white); border-radius: 50%; font-size: 1.5rem; font-weight: 900; line-height: 60px; margin-bottom: var(--spacing-md); }
        .fase-title { font-size: 1.5rem; margin-bottom: var(--spacing-sm); }
        .profesores { background: var(--grey-100); }
        .profesores-header { text-align: center; max-width: 800px; margin: 0 auto var(--spacing-xl); }
        .profesores-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(280px,1fr)); gap: var(--spacing-lg); }
        .profesor-card { background: var(--nnexa-white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition-normal); }
        .profesor-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-lg); }
        .profesor-image { width: 100%; height: 320px; object-fit: cover; object-position: center top; }
        .profesor-body { padding: var(--spacing-md); }
        .profesor-name { font-size: 1.5rem; margin-bottom: var(--spacing-xs); }
        .profesor-title { color: var(--nnexa-teal); font-weight: 600; margin-bottom: var(--spacing-sm); }
        .profesor-bio { color: var(--grey-700); line-height: 1.6; font-size: 0.95rem; margin-bottom: var(--spacing-sm); }
        .profesor-linkedin { display: inline-flex; align-items: center; gap: 0.4rem; margin-top: var(--spacing-xs); color: #0077B5; font-weight: 600; font-size: 0.9rem; text-decoration: none; transition: var(--transition-fast); }
        .profesor-linkedin:hover { color: var(--nnexa-teal); transform: translateX(3px); }
        .beneficios { background: var(--nnexa-white); }
        .beneficios-header { text-align: center; max-width: 800px; margin: 0 auto var(--spacing-xl); }
        .beneficios-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(300px,1fr)); gap: var(--spacing-md); }
        .beneficio-card { background: var(--grey-100); padding: var(--spacing-lg); border-radius: var(--radius-lg); display: flex; gap: var(--spacing-md); transition: var(--transition-normal); }
        .beneficio-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
        .beneficio-icon { font-size: 2rem; color: var(--nnexa-yellow); flex-shrink: 0; }
        .beneficio-content h4 { margin-bottom: var(--spacing-xs); }
        .beneficio-content p { color: var(--grey-700); font-size: 0.95rem; margin-bottom: 0; }
        .target { background: var(--grey-100); }
        .target-header { text-align: center; max-width: 800px; margin: 0 auto var(--spacing-xl); }
        .target-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(250px,1fr)); gap: var(--spacing-md); }
        .target-card { background: var(--nnexa-white); padding: var(--spacing-lg); border-radius: var(--radius-lg); text-align: center; transition: var(--transition-normal); }
        .target-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
        .target-icon { font-size: 3rem; margin-bottom: var(--spacing-md); }
        .target-card:nth-child(1) .target-icon { color: var(--presencial-primary); }
        .target-card:nth-child(2) .target-icon { color: var(--hibrido-primary); }
        .target-card:nth-child(3) .target-icon { color: var(--nnexa-teal); }
        .target-card:nth-child(4) .target-icon { color: var(--nnexa-yellow); }
        .testimonios { background: var(--nnexa-white); }
        .testimonios-header { text-align: center; max-width: 800px; margin: 0 auto var(--spacing-xl); }
        .testimonios-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(350px,1fr)); gap: var(--spacing-lg); }
        .testimonio-card { background: var(--grey-100); padding: var(--spacing-lg); border-radius: var(--radius-lg); position: relative; }
        .testimonio-quote { font-size: 3rem; color: var(--nnexa-yellow); opacity: 0.3; position: absolute; top: 20px; left: 20px; }
        .testimonio-text { font-style: italic; color: var(--grey-700); margin-bottom: var(--spacing-md); position: relative; z-index: 1; }
        .testimonio-author { display: flex; align-items: center; gap: var(--spacing-sm); }
        .testimonio-author-name { font-weight: 600; color: var(--grey-900); }
        .testimonio-author-role { font-size: 0.875rem; color: var(--grey-500); }
        .testimonio-stars { color: var(--nnexa-yellow); margin-top: var(--spacing-sm); }
        .faq { background: var(--grey-100); }
        .faq-header { text-align: center; max-width: 800px; margin: 0 auto var(--spacing-xl); }
        .faq-list { max-width: 900px; margin: 0 auto; }
        .faq-item { background: var(--nnexa-white); margin-bottom: var(--spacing-md); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); }
        .faq-question { width: 100%; padding: var(--spacing-md); background: var(--nnexa-white); border: none; text-align: left; font-family: var(--font-primary); font-size: 1.125rem; font-weight: 600; cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: var(--transition-fast); }
        .faq-question:hover { color: var(--nnexa-teal); }
        .faq-question i { transition: var(--transition-fast); }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
        .faq-answer-content { padding: 0 var(--spacing-md) var(--spacing-md); color: var(--grey-700); line-height: 1.8; }
        .faq-item.active .faq-answer { max-height: 500px; }
        .cta-final { background: linear-gradient(135deg, var(--grey-900) 0%, var(--grey-800) 100%); color: var(--nnexa-white); position: relative; overflow: hidden; }
        .cta-final::before { content: ''; position: absolute; top: -50%; right: -10%; width: 600px; height: 600px; background: var(--nnexa-yellow); opacity: 0.1; border-radius: 50%; filter: blur(100px); }
        .cta-content { position: relative; z-index: 1; }
        .cta-header { text-align: center; max-width: 800px; margin: 0 auto var(--spacing-xl); }
        .cta-header h2 { color: var(--nnexa-white); }
        .cta-header p { color: rgba(255,255,255,0.8); }
        .cta-forms { display: grid; grid-template-columns: repeat(auto-fit,minmax(450px,1fr)); gap: var(--spacing-lg); }
        .cta-form { background: var(--nnexa-white); padding: var(--spacing-lg); border-radius: var(--radius-xl); }
        .form-header { margin-bottom: var(--spacing-md); }
        .form-tag { display: inline-block; padding: 0.5rem 1rem; border-radius: var(--radius-sm); font-size: 0.875rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; margin-bottom: var(--spacing-sm); color: var(--nnexa-white); }
        .form-tag.presencial { background: var(--presencial-primary); }
        .form-tag.hibrido { background: var(--hibrido-primary); }
        .form-title { font-size: 1.5rem; color: var(--grey-900); }
        .form-group { margin-bottom: var(--spacing-md); }
        .form-label { display: block; font-weight: 600; margin-bottom: var(--spacing-xs); color: var(--grey-900); }
        .form-input, .form-textarea { width: 100%; padding: 0.75rem 1rem; border: 2px solid var(--grey-300); border-radius: var(--radius-sm); font-family: var(--font-secondary); font-size: 1rem; transition: var(--transition-fast); }
        .form-input:focus, .form-textarea:focus { outline: none; border-color: var(--nnexa-teal); }
        .form-textarea { resize: vertical; min-height: 100px; }
        .form-submit { width: 100%; }
        .footer { background: var(--grey-900); color: var(--nnexa-white); padding: var(--spacing-xl) 0 var(--spacing-md); }
        .footer-content { display: grid; grid-template-columns: repeat(auto-fit,minmax(250px,1fr)); gap: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
        .footer-section h4 { color: var(--nnexa-yellow); margin-bottom: var(--spacing-md); }
        .footer-logo img { height: 60px; margin-bottom: var(--spacing-md); }
        .footer-description { color: rgba(255,255,255,0.7); line-height: 1.6; }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: var(--spacing-sm); }
        .footer-links a { color: rgba(255,255,255,0.7); text-decoration: none; transition: var(--transition-fast); }
        .footer-links a:hover { color: var(--nnexa-yellow); }
        .footer-contact p { color: rgba(255,255,255,0.7); margin-bottom: var(--spacing-sm); display: flex; align-items: center; gap: var(--spacing-sm); }
        .footer-contact i { color: var(--nnexa-teal); }
        .footer-social { display: flex; gap: var(--spacing-md); margin-top: var(--spacing-md); }
        .social-link { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; background: rgba(255,255,255,0.1); border-radius: 50%; color: var(--nnexa-white); transition: var(--transition-fast); }
        .social-link:hover { background: var(--nnexa-yellow); color: var(--grey-900); transform: translateY(-3px); }
        .footer-bottom { text-align: center; padding-top: var(--spacing-md); border-top: 1px solid rgba(255,255,255,0.1); color: rgba(255,255,255,0.5); }
        .whatsapp-float { position: fixed; bottom: 30px; right: 30px; width: 60px; height: 60px; background: #25D366; color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 2rem; box-shadow: var(--shadow-lg); z-index: 999; transition: var(--transition-fast); animation: pulse 2s infinite; }
        .whatsapp-float:hover { transform: scale(1.1); background: #128C7E; }
        @keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(37,211,102,0.7); } 50% { box-shadow: 0 0 0 15px rgba(37,211,102,0); } }
        .back-to-top { position: fixed; bottom: 100px; right: 30px; width: 50px; height: 50px; background: var(--nnexa-yellow); color: var(--grey-900); border-radius: 50%; display: none; align-items: center; justify-content: center; font-size: 1.5rem; cursor: pointer; box-shadow: var(--shadow-md); z-index: 998; transition: var(--transition-fast); }
        .back-to-top.show { display: flex; }
        .back-to-top:hover { background: var(--nnexa-teal); color: var(--nnexa-white); transform: translateY(-5px); }
        .notification { position: fixed; top: 100px; right: 30px; background: var(--nnexa-white); padding: var(--spacing-md); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); z-index: 1001; display: none; align-items: center; gap: var(--spacing-sm); min-width: 300px; animation: slideInRight 0.3s ease; }
        .notification.show { display: flex; }
        .notification.success { border-left: 4px solid #27AE60; }
        .notification.error { border-left: 4px solid #E74C3C; }
        .notification i { font-size: 1.5rem; }
        .notification.success i { color: #27AE60; }
        .notification.error i { color: #E74C3C; }
        @keyframes slideInRight { from { transform: translateX(400px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
        @media (max-width: 1024px) {
            .programas-grid, .cta-forms { grid-template-columns: 1fr; }
            .timeline::before { left: 30px; }
            .timeline-item:nth-child(odd), .timeline-item:nth-child(even) { flex-direction: row; padding-left: 60px; }
            .timeline-marker { left: 30px; }
        }
        @media (max-width: 768px) {
            .nav-menu { position: fixed; top: 70px; left: -100%; width: 100%; height: calc(100vh - 70px); background: var(--nnexa-white); flex-direction: column; padding: var(--spacing-lg); transition: var(--transition-normal); box-shadow: var(--shadow-lg); }
            .nav-menu.active { left: 0; }
            .nav-toggle { display: block; }
            .hero-ctas { flex-direction: column; }
            .btn { width: 100%; }
            .intro-cards, .beneficios-grid, .target-grid, .testimonios-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            :root { --spacing-xl: 2rem; --spacing-2xl: 3rem; }
            section { padding: var(--spacing-xl) 0; }
            .whatsapp-float { width: 50px; height: 50px; font-size: 1.5rem; bottom: 20px; right: 20px; }
            .back-to-top { bottom: 80px; right: 20px; }
        }